CN204526938U - A kind of tipper lifting mechanism - Google Patents

Abstract

The utility model discloses a lifting mechanism for a dump truck, which comprises a telescopic link device. The telescopic link device includes an upper triangular arm and a lower triangular arm, and a telescopic pull rod and a fixed-length pull rod are hinged between the upper triangular arm and the lower triangular arm; The upper end of the telescopic rod is hinged with the upper end of the upper triangular arm, the lower end of the telescopic rod and the lower end of the fixed-length rod are jointly hinged at the upper end of the lower triangular arm; the upper end of the fixed-length rod is hinged with the lower end of the upper triangular arm; the middle of the upper triangular arm The first link is fixed, the middle of the lower triangular arm is fixed with the second link, the telescopic link device is connected by the first link and the second link, and a hydraulic cylinder is hinged between the first link and the second link ; The mechanism composed of the telescopic link device and the hydraulic cylinder can realize two lifts. The mechanism can achieve two lifting amplifications, use a shorter-stroke lifting cylinder to obtain large-angle lifting, and occupy less space, which can lower the center of gravity of the dump truck and improve its driving stability and lifting stability.

Description

A dump truck lifting mechanism

technical field

The utility model belongs to the technical field of dump trucks, in particular to a lifting mechanism for dump trucks.

Background technique

Dump trucks are classified according to the lifting type, generally divided into direct push type and connecting rod combination type. The connecting rod combination is composed of a lifting cylinder and a set of pull rods, triangle arms and other amplification mechanisms. The so-called amplification mechanism means that a short-stroke lifting cylinder can be used to obtain a large-angle lift through this mechanism. The connecting rod combined dump truck is more favored by users because of its cheap price and good lifting stability. However, there are also defects in the connecting rod combined dump truck. Because the amplifying mechanism takes up a large space, the center of gravity of the dump truck is relatively high, which affects the driving stability and lifting stability of the dump truck.

Utility model content

The purpose of this utility model is to overcome the deficiencies of the above-mentioned prior art, and provide a dump truck lifting mechanism. The cylinder achieves a large-angle lift and takes up less space, which can lower the center of gravity of the dump truck and improve its driving stability and lifting stability.

In order to achieve the above object, the utility model adopts the following technical solutions:

A lifting mechanism for a dump truck, comprising a telescopic link device, the telescopic link device comprising an upper triangular arm and a lower triangular arm, a telescopic pull rod and a fixed-length pull rod are hinged between the upper triangular arm and the lower triangular arm; The upper end of the telescopic pull rod is hinged with the upper end of the upper triangular arm, the lower end of the telescopic pull rod and the lower end of the fixed-length pull rod are jointly hinged at the upper end of the lower triangular arm; the upper end of the fixed-length pull rod is hinged with the lower end of the upper triangular arm ;

The middle part of the upper triangular arm is fixed with the first link, the middle part of the lower triangular arm is fixed with the second link, the telescopic link devices are connected by the first link and the second link, and the first link A hydraulic cylinder is hinged between the rod and the second connecting rod; the mechanism composed of the telescopic connecting rod device and the hydraulic cylinder can realize two lifts;

The lower part of the upper end of the lower triangular arm is provided with a limiting device to limit the downward rotation of the lower triangular arm.

The upper end of the hydraulic cylinder is hinged with the middle part of the first connecting rod, and the lower end of the hydraulic cylinder is hinged with the middle part of the second connecting rod.

The lower end of the lower triangular arm is hinged on the sub-frame of the dump truck.

The upper end of the upper triangular arm is hinged on the bottom plate of the dump truck compartment.

The limiting device is fixed on the sub-frame of the dump truck.

The limiting device is a section steel or a bent piece, which can withstand a force not less than 1.5 times the thrust of the hydraulic cylinder.

The hydraulic cylinder is a single-acting piston cylinder.

The upper triangular arm, the lower triangular arm, the telescopic pull rod and the fixed-length pull rod are castings.

When the dump truck is lifted, the hydraulic cylinder extends to form a thrust on the upper triangular arm. Through the transmission of force, the car is lifted, the upper triangular arm and the lower triangular arm are displaced relative to each other, and the telescopic rod is extended; when the telescopic rod is extended When the maximum value is reached, the relative positions of the telescopic rod, the upper triangular arm and the fixed-length rod will not change. When the hydraulic cylinder continues to extend, the lower triangular arm will start to rotate, and the carriage will continue to lift until the hydraulic cylinder is extended to the maximum value. . When the carriage lands, the hydraulic cylinder retracts, and each component moves in the opposite direction as above, and the carriage returns to the initial state.

In the lifting process of the dump car, the utility model firstly realizes the lifting amplification effect once by the rotation of the upper triangular arm, and then realizes the second lifting amplification effect by the rotation of the lower triangular arm, that is, can realize the double lifting amplification effect. Because it can achieve two lifting amplifications, under the premise that the required lifting angle can be realized, the size of the upper and lower triangle arms can be appropriately reduced to lower the center of gravity of the dump truck; the telescopic pull rod can prevent the hydraulic cylinder from contacting the upper triangle. There is a motion dead point during the movement of the arm.

The beneficial effects of the utility model are: the mechanism can realize two times of lifting amplification, use the lifting cylinder with a shorter stroke to obtain large-angle lifting, and occupy less space, can reduce the center of gravity of the dump truck, improve its driving stability and lift stability.

Description of drawings

Fig. 1 is the schematic diagram before lifting of the lifting mechanism of the utility model dump truck;

Fig. 2 is the schematic diagram of the three-dimensional model of the lifting mechanism of the dump truck of the present invention;

Fig. 3 is a schematic diagram of the lifting mechanism of the dump truck of the present invention, wherein the telescopic rod is extended to the maximum value;

Fig. 4 is the schematic diagram that the lifting mechanism of the dump truck of the present invention completes the lifting;

Among the figure, 1 is an upper triangular arm, 2 is a hydraulic cylinder, 3 is a telescopic pull rod, 4 is a fixed-length pull rod, 5 is a lower triangular arm, 6 is a beam, 7 is a carriage floor, and 8 is an auxiliary frame.

Detailed ways

Below in conjunction with accompanying drawing and embodiment the utility model is further described.

As shown in Figure 1-Figure 2, the lifting mechanism of the dump truck includes two telescopic linkage devices, a hydraulic cylinder 2 and a beam 6, and the telescopic linkage device includes an upper triangular arm 1, a telescopic pull rod 3, a fixed-length pull rod 4, a lower Triangular arm 5. Among them, the upper triangular arm 1 is hinged to the compartment floor 7, the upper triangular arm 1 is hinged to the telescopic pull rod 3, the upper triangular arm 1 is hinged to the fixed-length pull rod 4; the lower triangular arm 5 is hinged to the sub-frame 8, and the lower triangular arm 5 is connected to the telescopic pull rod 3 is hinged, the lower triangular arm 5 is hinged with the fixed-length pull rod 4; the middle parts of the upper triangular arm 1 and the lower triangular arm 5 are all fixed connecting rods, and the two telescopic connecting rod devices are connected by connecting rods, and a hydraulic pressure is connected between the two connecting rods. Cylinder 2; beam 6 is fixed on the sub-frame 8 and is located at the lower part of the front end of the lower triangular arm 5, which can exert an upward force on the lower triangular arm 5 and limit the downward rotation of the lower triangular arm 5; During the lifting and enlarging process, the crossbeam 6 plays a supporting role for the whole mechanism, so the crossbeam 6 must be fixed firmly, and can withstand the force not less than 1.5 times the thrust of the hydraulic cylinder. The hydraulic cylinder 2 is a single-acting piston cylinder, and the upper triangular arm 1, the lower triangular arm 5, the telescopic pull rod 3, and the fixed-length pull rod 4 are castings.

The lifting mechanism of the dump truck is arranged in the frame of the dump truck, wherein the hydraulic cylinder 2 is located on the center line, and the telescopic connecting rod device is symmetrical to each other with the hydraulic cylinder 2 as the center line.

As shown in Figure 3, when the dump car is lifted, the hydraulic cylinder 2 is extended to form a thrust on the upper triangular arm 1. Through the transmission of force, the thrust acts on the car floor 7, and the car is lifted. At this time, the lower triangular arm 5 No movement occurs; the upper triangular arm 1 and the lower triangular arm 5 have a relative displacement, and the telescopic rod 3 is extended. With the extension of the hydraulic cylinder 2, when the telescopic rod 3 is stretched to the maximum value, the lifting mechanism is controlled by the upper triangular arm 1 The rotation completes the first lifting magnification effect, and now the relative positions of the telescopic pull rod 3, the upper triangular arm 1, and the fixed-length pull rod 4 no longer change.

As shown in Figure 4, when the hydraulic cylinder 2 continues to extend, the relative positions of the telescopic rod 3, the upper triangular arm 1, and the fixed-length rod 4 will no longer change. , until the hydraulic cylinder 2 is stretched to the maximum value, the lifting mechanism is rotated by the lower triangular arm 5 to complete the second lifting amplification effect, and now the carriage is lifted to the maximum angle.

When the carriage landed, the hydraulic cylinder 2 retracted, and each component moved in the opposite direction, and the carriage returned to the initial state.

During the lifting process of the dump truck, since two lifting amplifications can be achieved, the dimensions of the upper triangular arm 1 and the lower triangular arm 5 can be appropriately reduced on the premise of realizing the required lifting angle, so as to lower the dump truck. Center of gravity position. The length of the telescopic pull rod 3 is scalable, and the maximum value of the telescopic pull rod 3 must ensure that the hydraulic cylinder 2 and the upper triangular arm 1 will not have a motion dead point during motion.

Although the specific implementation of the utility model has been described above in conjunction with the accompanying drawings, it does not limit the protection scope of the utility model. Those skilled in the art should understand that on the basis of the technical solution of the utility model, those skilled in the art do not need to Various modifications or deformations that can be made with creative efforts are still within the protection scope of the present utility model.

Claims (8)

1. a tipper lifting mechanism, is characterized in that, comprises shrinking connecting-rod device, and described shrinking connecting-rod device comprises Triangular Arm and lower Triangular Arm, is hinged with telescopic lever and fixed length pull bar between described upper Triangular Arm and lower Triangular Arm; The upper end of described telescopic lever and the upper end of upper Triangular Arm are hinged, and the lower end of described telescopic lever and the lower end of fixed length pull bar are articulated with the upper end of lower Triangular Arm jointly; The upper end of described fixed length pull bar and the lower end of upper Triangular Arm are hinged;

Fix first connecting rod in the middle part of described upper Triangular Arm, second connecting rod is fixed at the middle part of described lower Triangular Arm, is connected, is hinged with hydraulic actuating cylinder between described first connecting rod and second connecting rod between described shrinking connecting-rod device by first connecting rod with second connecting rod; The mechanism of described shrinking connecting-rod device and hydraulic actuating cylinder composition can realize twice lifting;

The bottom of described lower Triangular Arm upper end is provided with inhibiting device, rotating of the lower Triangular Arm of restriction.

2. tipper lifting mechanism as claimed in claim 1, it is characterized in that, the middle part of described hydraulic actuating cylinder upper end and first connecting rod is hinged, and the lower end of hydraulic actuating cylinder and the middle part of second connecting rod are hinged.

3. tipper lifting mechanism as claimed in claim 1, it is characterized in that, the lower end of described lower Triangular Arm is articulated with on Self-discharging vehicle sub car-frame.

4. tipper lifting mechanism as claimed in claim 1, it is characterized in that, the upper end thereof of described upper Triangular Arm is on dump truck carriage floor.

5. tipper lifting mechanism as claimed in claim 1, it is characterized in that, described inhibiting device is fixed on Self-discharging vehicle sub car-frame.

6. tipper lifting mechanism as claimed in claim 1, it is characterized in that, described inhibiting device is shaped steel or bending part.

7. tipper lifting mechanism as claimed in claim 1, it is characterized in that, described hydraulic actuating cylinder is single-action piston cylinder.

8. tipper lifting mechanism as claimed in claim 1, it is characterized in that, described upper Triangular Arm, lower Triangular Arm, telescopic lever, fixed length pull bar are Casting Parts.